Cross-rolling mill

Abstract

A rolling mill has upper and lower rolls with axes which cross each other. These two rolls are pivoted at ends diametrically opposite to each other. Only rolls chocks mounted at the non-pivoted ends of the rolls are allowed to be hydraulically moved the same distance in the same direction, i.e., the rolling direction or the reverse direction, in a symmetrical relation with respect to the center line of the rolling mill.

What is claimed is: 
     
       1. A cross-rolling mill comprising: a first roll rotatably mounted in the mill about a rotational axis thereof, said first roll having a first end at a driver side of the mill and a second end at a work side of the mill;   a second roll rotatably mounted in the mill about a rotational axis thereof and coacting with said first roll for rolling a workpiece travelling in a rolling direction, the rotational axis of said first roll extending in a first plane that is parallel to a second plane in which the rotational axis of said second roll extends and a third plane in which the rolling direction extends, said second roll having a first end adjacent the first end of said first roll at the driver side of the mill and a second end adjacent the second end of said first roll at the work side of the mill, the mill having a center line passing through a point generally midway along the length of and between said first and second rolls and extending in a direction transverse to the direction in which said rolls extend,   said first roll being pivotal in the mill in said first plane only about the first end thereof at the driver side of the mill,   said second roll being pivotal in the mill in said second plane only about the second end thereof at the work side of the mill; and   pivoting means for pivoting said first roll in the mill only about the first end thereof and said second roll only about the second end thereof so that an axis intersecting the center line of the mill and the rotational axes of said first and said second rolls is repositionable along the center line while continuing to intersect the center line.   
     
     
       2. A rolling mill as claimed in claim 1, and further comprising a first roll chock to which the second end of the first roll is mounted, said first roll chock being displaceable in the mill over a distance in both the rolling direction and a direction opposite to the rolling direction, and a second roll chock to which the first end of the second roll is mounted, said second roll chock being displaceable in the mill over a distance in both the rolling direction and the direction opposite to the rolling direction, and wherein said pivoting means comprises means for displacing said first roll chock and said second roll chock in the mill over the same said distance in the same one of said rolling direction and said direction opposite to the rolling direction.   
     
     
       3. A cross-rolling mill as claimed in claim 1, wherein each of the first end of said first roll and the second end of said second roll has a respective chock liner and a housing liner engaging the chock liner.   
     
     
       4. A cross-rolling mill as claimed in claim 3, wherein each respective chock liner is flat and each respective housing liner is cylindrical.   
     
     
       5. A cross-rolling mill as claimed in claim 2, wherein said means for displacing are hydraulic cylinders.   
     
     
       6. A cross-rolling mill as claimed in claim 2, wherein said means for displacing comprises electric motors.